Note: You can only create line styles in the project environment. You can modify line weight, line color, and line pattern in the Family Editor. See Modifying Line Styles in the Family Editor.
Click Manage tabSettings panelAdditional Settings drop-down Line Styles.
In the Line Styles dialog, click New, and enter a new name for the line style.
The name displays under Category in the Line Styles dialog.
Click the value for Line Weight to choose a line weight.
Click the value for Line Color to choose a line color.
Click the value for Line Pattern to choose a line pattern.